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Pricing

I built SysDesAi for myself, then shared it with friends. Now I'm putting it out there for everyone. Bring your own API key and use it for free.

Free Forever

No sign-up required for most features. No credit card. No trial period.

  • Software Architecture Academy (11 modules, 60+ lessons)
  • Design Gallery with 48+ architecture walkthroughs
  • Curated engineering news feed from 35+ blogs
  • Discussions forum & threaded comments
  • Architect profiles & directory
  • Leaderboard & reputation system
  • Activity feed & notifications
  • Completion certificate for the course

Bring Your Own Key

Free

Design generation and chat run on Google Gemini. Video interviews use OpenAI for real-time voice. I can't foot the AI bill for all users, so you plug in your own API keys and get full access — AI architect, video interviews, everything — no limits, no charges from SysDesAi. You just pay the providers directly for what you use.

Your key is stored only in your browser and never logged or stored on our servers. It is sent directly to Google from our server to generate your designs.

AI Architect Credits

Every new user gets 50 free credits to try things out. If you'd rather skip the API key setup, you can buy more (which also helps keep the project going).

Starter

$5/ 50 credits

$0.10 per credit

  • 10 Fast designs
  • 2 Deep Thinking designs
  • 50 Fast chat messages
Best value

Pro

$20/ 250 credits

$0.08 per credit — save 20%

  • 50 Fast designs
  • 10 Deep Thinking designs
  • 250 Fast chat messages

Credit Cost Reference

Action Fast Deep Thinking
Design step generation5 credits25 credits
Chat message1 credit5 credits
Video interview session30 credits
Fix broken diagramFree (no credits)

How to Get Started

  1. Use your free credits — every new account gets 50 free credits, no payment required.
  2. Add your own API key — open the credits menu in the header, paste a Google Gemini API key, and use the AI architect for free with no limits. Your key is stored only in your browser.
  3. Purchase credits — if you'd rather not set up an API key, packs start at $5. It also helps keep the project going.

Have questions? Check the FAQ